// stock1.cpp -- Stock class implementation with constructors, destructor added
#include <iostream>
#include <cstring>
#include "stock1.h"

// constructors (verbose versions)
Stock::Stock()
{
	std::cout << "Default constructor called\n";
	std::strcpy(company, "no name");
	shares = 0;
	share_val = 0.0;
	total_val = 0.0;
}

Stock::Stock(const char * co, int n, double pr)
{
	std::cout << "Constructor using " << co << " called\n";
	std::strncpy(company, co, 29);
	company[29] = '\0';

	if(n<0)
	{
		std::cerr << "Number of shares can't be negative; "
			<< company << " shares set 0.\n";
		shares = 0;
	} else {
		shares = n;	
	}

	share_val = pr;
	set_tot();
}

Stock::~Stock()
{
	std::cout << "Bye, " << company << "!\n";
}


void Stock::buy(int num, double price)
{
	if(num < 0)
	{
		std::cerr << "Number of shares purchased can't be negative. "
			<< "Transaction is aborted.\n";
	} 
	else 
	{
		shares += num;
		share_val = price;
		set_tot();
	}
}

void Stock::sell(int num, double price)
{
	using std::cerr;
	if(num < 0)
	{
		cerr << "Number of shares sold can't be negative. "
			<< "Transaction is aborted.\n";
	} 
	else if(num > shares)
	{
		cerr << "You can't sell more than you have! "
			<< "Transaction is aborted.\n";
	} 
	else 
	{
		shares -= num;
		share_val = price;
		set_tot();
	}
}

void Stock::update(double price)
{
	share_val = price;
	set_tot();
}

void Stock::show() const
{
	using std::cout;
	using std::endl;

	cout << "Company: " << company
		<< " Shares: " << shares << endl
		<< " Share Priece: $" << share_val 
		<< " Total Worth: $" << total_val << endl;
}
